Question: What Is @Component Annotation In Spring?

What is the use of @component annotation in spring?

@Component is the most generic Spring annotation.

A Java class decorated with @Component is found during classpath scanning and registered in the context as a Spring bean.

@Service , @Repository , and @Controller are specializations of @Component , which are used for more specific cases..

What’s the difference between @component @controller @repository & @service annotations in spring?

Their only difference comes in their purpose i.e. @Controller is used in Spring MVC to define controller, which are first Spring bean and then the controller. Similarly, @Service is used to annotated classes that hold business logic in the Service layer and @Repository is used in the Data Access layer.

What is difference between @component and @bean in spring?

@Component auto detects and configures the beans using classpath scanning whereas @Bean explicitly declares a single bean, rather than letting Spring do it automatically.

What is use of @autowired in spring?

The @Autowired annotation can be used to autowire bean on the setter method just like @Required annotation, constructor, a property or methods with arbitrary names and/or multiple arguments. …

What is the difference between @bean and @autowired?

Annotating @Bean only registers the service as a bean(kind of an Object) in spring application context. … Annotating a variable with @Autowired injects a BookingService bean(i.e Object) from Spring Application Context.

What is the difference between @component and @ComponentScan?

@Component and @ComponentScan are for different purposes. @Component indicates that a class might be a candidate for creating a bean. It’s like putting a hand up. @ComponentScan is searching packages for Components.

What is @component in Java?

A component is an object having a graphical representation that can be displayed on the screen and that can interact with the user. Examples of components are the buttons, checkboxes, and scrollbars of a typical graphical user interface.

Which Autowiring is better in spring?

Advantages of Autowiring Autowiring requires less code because we don’t need to write the code to inject the dependency explicitly. It reduces develop time by removing the necessity of specifying properties and constructor arguments.

What is difference between @inject and @autowired?

The @Autowired annotation is used for auto-wiring in Spring framework. … The @Inject annotation also serves the same purpose, but the main difference between them is that @Inject is a standard annotation for dependency injection and @Autowired is spring specific.